Firstly, your entire point of having things to keep other things in check certainly exists, but the best is only the best because there is nothing better than it, not because there isn't a specific counter. Secondly, it is a terrible idea to allow abilities to be really strong, even if there is a specific counter, because I should never be forced to change my playstyle to hard counter a playstyle which is not the hard counter of my own. Thirdly, yeah sure we can add more utility to class abilities. But that's the exact opposite of easy and totally infeasible for a non-major release. keep dreaming.